diff --git a/akaze/src/descriptors.rs b/akaze/src/descriptors.rs
index 4afb3718..7d3c30dc 100644
--- a/akaze/src/descriptors.rs
+++ b/akaze/src/descriptors.rs
@@ -18,27 +18,29 @@ impl Akaze {
         evolutions: &[EvolutionStep],
         keypoints: &[KeyPoint],
     ) -> (Vec<KeyPoint>, Vec<BitArray<64>>) {
-        #[cfg(not(feature = "rayon"))] {
-        keypoints
-            .iter()
-            .filter_map(|&keypoint| {
-                Some((
-                    keypoint,
-                    self.get_mldb_descriptor(&keypoint, evolutions).ok()?,
-                ))
-            })
-            .unzip()
+        #[cfg(not(feature = "rayon"))]
+        {
+            keypoints
+                .iter()
+                .filter_map(|&keypoint| {
+                    Some((
+                        keypoint,
+                        self.get_mldb_descriptor(&keypoint, evolutions).ok()?,
+                    ))
+                })
+                .unzip()
         }
-        #[cfg(feature = "rayon")] {
-        keypoints
-            .par_iter()
-            .filter_map(|&keypoint| {
-                Some((
-                    keypoint,
-                    self.get_mldb_descriptor(&keypoint, evolutions).ok()?,
-                ))
-            })
-            .unzip()
+        #[cfg(feature = "rayon")]
+        {
+            keypoints
+                .par_iter()
+                .filter_map(|&keypoint| {
+                    Some((
+                        keypoint,
+                        self.get_mldb_descriptor(&keypoint, evolutions).ok()?,
+                    ))
+                })
+                .unzip()
         }
     }
 
diff --git a/akaze/src/detector_response.rs b/akaze/src/detector_response.rs
index 70ae8bb4..696c03a1 100644
--- a/akaze/src/detector_response.rs
+++ b/akaze/src/detector_response.rs
@@ -58,24 +58,28 @@ impl Akaze {
 }
 
 fn compute_multiscale_derivatives_for_evolution(evolution: &mut EvolutionStep, sigma_size: u32) {
-    #[cfg(not(feature = "rayon"))] {
+    #[cfg(not(feature = "rayon"))]
+    {
         evolution.Lx = derivatives::scharr_horizontal(&evolution.Lsmooth, sigma_size);
         evolution.Ly = derivatives::scharr_vertical(&evolution.Lsmooth, sigma_size);
         evolution.Lxx = derivatives::scharr_horizontal(&evolution.Lx, sigma_size);
         evolution.Lyy = derivatives::scharr_vertical(&evolution.Ly, sigma_size);
         evolution.Lxy = derivatives::scharr_vertical(&evolution.Lx, sigma_size);
     }
-    #[cfg(feature = "rayon")] {
+    #[cfg(feature = "rayon")]
+    {
         (evolution.Lx, evolution.Ly) = rayon::join(
             || derivatives::scharr_horizontal(&evolution.Lsmooth, sigma_size),
             || derivatives::scharr_vertical(&evolution.Lsmooth, sigma_size),
         );
         (evolution.Lxx, (evolution.Lyy, evolution.Lxy)) = rayon::join(
             || derivatives::scharr_horizontal(&evolution.Lx, sigma_size),
-            || rayon::join(
-                || derivatives::scharr_vertical(&evolution.Ly, sigma_size),
-                || derivatives::scharr_vertical(&evolution.Lx, sigma_size),
-            )
+            || {
+                rayon::join(
+                    || derivatives::scharr_vertical(&evolution.Ly, sigma_size),
+                    || derivatives::scharr_vertical(&evolution.Lx, sigma_size),
+                )
+            },
         )
     }
 }
diff --git a/akaze/src/lib.rs b/akaze/src/lib.rs
index d8192029..571d90bd 100644
--- a/akaze/src/lib.rs
+++ b/akaze/src/lib.rs
@@ -201,13 +201,15 @@ impl Akaze {
             }
             evolutions[i].Lsmooth = gaussian_blur(&evolutions[i].Lt, 1.0f32);
             trace!("Gaussian blur finished.");
-            #[cfg(not(feature = "rayon"))] {
+            #[cfg(not(feature = "rayon"))]
+            {
                 evolutions[i].Lx = derivatives::simple_scharr_horizontal(&evolutions[i].Lsmooth);
                 trace!("Computing derivative Lx done.");
                 evolutions[i].Ly = derivatives::simple_scharr_vertical(&evolutions[i].Lsmooth);
                 trace!("Computing derivative Ly done.");
             }
-            #[cfg(feature = "rayon")] {
+            #[cfg(feature = "rayon")]
+            {
                 (evolutions[i].Lx, evolutions[i].Ly) = rayon::join(
                     || derivatives::simple_scharr_horizontal(&evolutions[i].Lsmooth),
                     || derivatives::simple_scharr_vertical(&evolutions[i].Lsmooth),
diff --git a/akaze/src/scale_space_extrema.rs b/akaze/src/scale_space_extrema.rs
index 322032d0..f368baf4 100644
--- a/akaze/src/scale_space_extrema.rs
+++ b/akaze/src/scale_space_extrema.rs
@@ -347,10 +347,7 @@ fn do_subpixel_refinement(
         }
     };
     #[cfg(not(feature = "rayon"))]
-    let result: Vec<_> = in_keypoints
-        .iter()
-        .filter_map(process_keypoint)
-        .collect();
+    let result: Vec<_> = in_keypoints.iter().filter_map(process_keypoint).collect();
     #[cfg(feature = "rayon")]
     let result: Vec<_> = in_keypoints
         .par_iter()